Data Source - Enrich Tool from ArcGIS Pro ????

[AlexP_]

Hello,

Please a screenshot below. I have ArcGIS pro, portal, and online. For this, I am using ArcGIS Pro and it's signed in to ArcGIS online. By using enrich tool, where is the data source coming from? does ESRI do their own surveys? Where is that data set coming from though - is it census, etc?? It is not clear. I read some info stated business analyst, esri or online. Please clarify. Thank you for support and time.